Texas Instruments SN74ABT5401DW

Overview

SN74ABT5401DW from Texas Instruments is an 11-bit inverting buffer/line driver with 3-state outputs, designed for memory address and bus-oriented applications. It operates from 4.5 V to 5.5 V, supports –40°C to 85°C, delivers ±12 mA output drive, features integrated 25-Ω series resistors, and uses EPIC-II^B BiCMOS technology for low power dissipation.

For engineers reviewing the SN74ABT5401DW datasheet, SN74ABT5401DW pinout, SN74ABT5401DW application, or SN74ABT5401DW equivalent, key selection criteria include 3-state control via dual active-low OE inputs, output undershoot/overshoot suppression, latch-up immunity (>500 mA), and compatibility with high-density memory and clock distribution systems.

Technical Context

This device implements a dual-input AND gate logic for 3-state control: both OE1 and OE2 must be low to enable inverted outputs; either high forces all 11 outputs into high-impedance. The outputs are actively terminated with on-die 25-Ω series resistors to dampen signal reflections without external components.

It uses EPIC-II^B BiCMOS process technology to achieve low static current (≤50 µA when disabled) and fast switching-typical tPLH/tPHL of 2–7 ns at 5 V with 50-pF load-while maintaining robust noise margins (VIL = 0.8 V, VIH = 2 V) and ground bounce <1 V (VOLP) under switching conditions.

Key Specifications

Pinout & Package

The SN74ABT5401DW is housed in a 28-pin plastic small-outline (SOIC) DW package, 300-mil body width, with standard JEDEC MO-153 footprint and gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 11-bit inverting 3-state buffer applications.

Compared with SN74ABT5401DW, SN74ABT244DW offers simpler control but lacks integrated termination and channel count, while SN74LVC541APW targets lower voltage systems and cannot operate at 5 V-making SN74ABT5401DW uniquely suited for legacy 5-V memory and bus designs requiring 11-bit inverting drive with built-in signal integrity features.

Availability

SN74ABT5401DW is available at Aetrix Electronics and suitable for memory subsystem design, industrial bus interface, and legacy system upgrades requiring stable component supply and long-term obsolescence management.

Supply support for SN74ABT5401DW includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The ABT logic family-including SN74ABT5401DW-is engineered for high-speed, low-noise 5-V bus and memory interface applications, emphasizing signal integrity, latch-up immunity, and compatibility with legacy TTL systems.

FAQ

What is the function of the dual OE inputs on the SN74ABT5401DW?

The SN74ABT5401DW uses two active-low output-enable inputs (OE1 and OE2) configured as a 2-input AND gate. Both must be low to enable the 11 inverted outputs; if either is high, all outputs enter high-impedance state. This design prevents bus contention during power sequencing and supports hierarchical enable schemes in multi-device systems. The SN74ABT5401DW's dual-OE architecture ensures deterministic 3-state behavior without external logic.

Does the SN74ABT5401DW require external series termination resistors?

No. The SN74ABT5401DW integrates 25-Ω series resistors on all 11 outputs, specifically designed to dampen overshoot and undershoot on PCB traces. This eliminates the need for external termination components, simplifying layout and reducing BOM cost. Measured VOLP < 1 V and VOLV < 0.5 V at 5 V confirm effective edge control-key for the SN74ABT5401DW's use in high-density memory and clock routing.

What is the recommended power-up sequence for the SN74ABT5401DW?

To ensure outputs remain in high-impedance during power-up, OE1 and OE2 should be tied to VCC through pullup resistors. TI specifies minimum resistor value based on driver sink capability; a 10-kΩ resistor is typical. This guarantees the SN74ABT5401DW starts in safe 3-state mode regardless of input states. The SN74ABT5401DW's internal design does not require strict VCC ramp rate control, but stable 5-V supply within 4.5–5.5 V is mandatory before asserting valid inputs.

Can the SN74ABT5401DW drive multiple TTL loads directly?

Yes. Each output of the SN74ABT5401DW sources or sinks ±12 mA, sufficient to drive up to 10 standard TTL loads (each requiring ~1.6 mA input current). Its guaranteed VOH ≥ 3.35 V at –12 mA and VOL ≤ 0.8 V at 12 mA meet TTL voltage thresholds across temperature and voltage ranges. This makes the SN74ABT5401DW ideal for direct interfacing in legacy systems without intermediate buffers.

Is the SN74ABT5401DW compatible with 3.3-V logic inputs?

No. The SN74ABT5401DW is a 5-V-only device with VIH = 2 V and VIL = 0.8 V-designed for TTL/5-V CMOS compatibility. While 3.3-V logic outputs may exceed VIL, they risk marginal VIH margin (3.3 V > 2 V, but noise immunity is reduced). For mixed-voltage systems, level translation is required before connecting to SN74ABT5401DW inputs. The SN74ABT5401DW does not support 3.3-V supply operation.